Windshield wiper



'.1\ug.22, 1944. C. R. PATON 2,356,424"

WINDSHIELD WIPER Filed Sept. l5, 1.941 2 Sheet-S-Sheet 1 "52 INVENTOR- -C'Zyde atofz U-Mzzww.

Aug. 22, 1944. C, R. PATON WINDSHIELD WIPER Filed Sept. 13, 1941 2 Sheets-Sheet 2 INVENTOR. Clyde @alto/7 M22? Y w/ @ttor/1e 75 ,Patented Aug. 22, 1944' 2,356,424

4)UNITED STATES `Pari-:ltr oFFicE WINDSHIELD WIPER Clyde R. Paton, Birmingham, Mich., assignor to PackardMotor Car Company, Detroit, Mich., a corporation of Michigan Application September 13, 1941, Serial No.` 410,721

9 Claims.

'I'his invention relates .to wiping devices for windows and windshields.

One type of wiper now in use consists of a surface contacting blade carried by an arm that seen in Figs. 1,`7 and 8, The windshield slopes rearwardly from the bottom to the top and the curved portion is in the form of a portion of a cylinder so that vertical lines thereon vwill be straight.

is oscillated in an arcuate path by some form of *'6 A'pair of similar devices are arranged to wipe power means. When the surfaceis in one plane, the front surface of the windshield to cleanpaths no difficulty is encountered in maintaining full in front of occupants of the vehicle. Such paths contact of the blade throughout its path of moveeach extend over fiat and curved pOlSiOnS f the ment. Some of the windshields and windows now Windshield Surface and the devices are arranged proposed for motor vehicles are curved or have l0 to eiiciently wipe such surface portions. flat side portions with an intermediate curved As the devices are similar, a description of one portion and only a portion of the blade of the will suflice for both. In each wiping device there oscillating` wiper previously employed will conis a blade consisting of a frame i6 supporting a tact such curved surfaces. rubber wiping element I6' having a straight edge It is an object of this invention to provide an that contacts the outer surface of the windshield. oscillating wiping device that will operate ef- This blade is reciprocated in an arcuate path by ficiently over a curved surface. actuator mechanism that includes an arm formed Another object of the invention is to provide of channel sections I1 and I8 secured together a wiping device in which a, blade can be oscilby a pivotal connection I9. The section I1 is lated in fun contact with a surface lying in more connected to the blade frame by pivot 20 and the than one plane. section I8 is connected to shaft 2l by fastening Another object of the invention is to provide .means 22. The Shaft Can be 050111315861 ina C011- a wiping device in which an oscillating wiping ventional manner by any suitable power mechablade is maintained parallel to vertical straight nlSm (Hety ShOWn). The blade iS Urged against lines of a curved Window surface over which it the Windshield Surface by pressure means in the is oscillated. l c form of a coil spring 23 having its ends attached Other objects of the invention will appear from to the sections of v the arm. The shaft extends the following description taken in connection through a cylindrical bearing member 24 that with the drawings, which forma part of this projects through and iS lXed Stationery t0 the specification, in which: y cowl. Fig, 1 is a perspective view of a front portion The angular relation of the blade to the acof a motorv vehicle containing the windshield and tuator arm is controlled by means operated in wiper devices incorporating the invention; conjunction with the shaft. A sleeve 25 extends Fig. 2 is a vertical sectional view taken subthrough the Cylindrical bearing and has a Slet stantially on line 2-2 of Fig. 1; 35 26 in the rear portion into which a driver pin Fig. 3 is a plan view of a portion of the operat- 2l, Xed 00 Shaft 2|, extends. A Step member ing mechanism for the wiping devicevshown in 28, in the form 0f@ bQSS 0n the fixed bearing. Fig. 2; y Y projects into the slot in the sleeve to limit the Figs. 4,. 5 and 6 are similar sectional views of TOtatiOnal movement 0f `l`1he-S1eeVe- An' arm 29 the actuating mechanism taken on line 4-4 of 4o projects from the rear end of the bearing and Fig. 2; l an arm 30 projects from the sleeve adjacent the Fig. 7 is a front elevational view of one of the rear end of the bearing. Coil spring 3| S 00nwiping devices shown in various positions in its neted at its" ends t0 arms 29 and 30- Alm 32 path of travel; is xed to and projects from the forward'end of Fig. 8 is a sectional elevational view taken 45 sleeve 25 and an arm 33 is iixed to and projects substantially on line 8 3 of Fig. 1. from the blade frame. "Ihese arms 32 and 33 are Referring to the drawings by characters of held parallel by link 34 pivoted at 35 t0 arm 33 reference, Hl indicates a motor vehicle of conand at 36 to arm 32. The arms 32 and 33, link ventional type having a cowl ll, a roof l2, and 34 and the sectionall actuator blade arm form a a glass windshield I3 between the cowl and the 5o parallelogram linkage mechanism for operating roof, The windshield glass is shown formed with the blade. a transversely curved or bowed central portion Whenv pin 21 engages sleeve 25, as viewed in t4 and with flat side portions l5, the bowed por- Fig. 5, and shaft 2| is rotated in a clockwise diltlcn extending between dotted lines A and B, as 5B rection to the position shown in Fig. 4 it will drive the sleeve therewith so that the blade arm and the linkage xed to the sleeve will move as a unit. When the pin 21 is moving in a counterclockwise direction between the positionsV shown in Figs. 4 and 5, spring 3| holds the sleeve pin 21 will be free to move in the sleeve slot 25.

With the sleeve held stationary, pivot 3B is held stationary and oscillation of the blade arm will cause shifting of the parallelogram linkagey to shift the angular relation of the wiper blade and frame relative to the actuator arm. This angular shifting of the blade occurs while moving over the curved surface portion of the windshield between lines A and B in Figs. l, '7 and 8. The blade will be rotated on its pivot 20 so that the edge remains parallel to vertical straight lines on the curved surface portion of the windshield. Thus, the blade travels in an arcuate path and the wiping edge will fully contact the windshield iiat and curved surface portions during the entire oscillatory movement.

Although the invention has been described in connection with a specific embodiment, the principles involved are susceptible of numerous other applications which will'readily occur to persons skilled in the art. The invention is therefore to be limited only as indicated by the scope of the appended claims.

What is claimed is:

1.- A device for wiping a windshield having a surface with flat and curved portions in a transverse direction comprising a wiper blade having an edge portion contacting the windshield surface, an arm pivoted, a universal joint pivotally connecting the arm to the blade, said arm being operable to reciprocate said blade in an arcuate path across the fiat and curved portion of said windshield surface, and means operating toswing said blade on'its pivot to hold the contacting edge portion thereof .parallel to vertical lines on the windshield surface while passing across the curved surface portion thereof and constraining said armI and blade to move together in fixed relation while passing across the fiat surface portion of the windshield surface.

2. A device for wiping a windshield surface having curved and fiat portions in a transverse direction comprising a wiper blade contacting said surface, a drive shaft adapted to be oscillated, an arm fixed to oscillate with the shaft, means including a universal joint connecting to the wiper blade, and means holding the wiper blade in fixed relation with the arm while moving across the flat surface portion of the windshield and shifting the pivotal relation of the wiper blade relative to the arm while moving across the curved surface portion of the windshield to maintain the blade parallel to straight lines on the curved surface portion of the windshield.

3. A device for wiping a windshield surface having curved and fiat portions in a transverse direction comprising a blade having a straight edge wiper portion adapted to be moved across the curved and flat portions of the windshield surface, Vparallelogram linkage including two parallel members pivotally connected to the blade, means operative to oscillate said linkage in an arcuate path, means operative to shift direction comprising a blade having a wiping edge, a jointed sectional arm pivotally connected at one end to the blade, journalled oscillating .means connected with the other end of the arm for moving said blade in an arcuate path across said surface portions, a spring connected with sections of the arm and exerting pressure to hold the wiping edge of the blade against the windshield surface, and means operative to shift said blade onuits pivot'while traversing the curved portion of the windshield surface and thereby maintain the blade edge portion parallel to straight lines on the curved surface and to fix the blade and the arm relatively while traversing the fiatportion of the vwindshield surface.

5. A device for wiping a windshield surface having curved and at portions in a transverse direction, comprising a blade having a straight wiping edge, a jointed sectional arm pivotally connected at one end to the blade, a shaft connected to the other end of the arm and adapted to be oscillated, a spring connecting said arm sections in relation holding said blade against `the windshield surface, and means for shifting the relation of the blade to the arm while moving over the curved surface portion of the windshield to maintain the wiping edge of the blade parallel to straight lines on the curved surface portion and for holding the blade and arm in fixed relation while traversing the flat portion of the windshield surface.

6. A device for wiping a windshield surface having curved and fiat portions in a transverse direction comprising a blade having a straight wiping edge, an arm pivoted at one end to the blade, a shaft connected to the other end of the arm, an anchored bearing in which the shaft can oscillate to reciprocate the arm and blade in an arcuate path, a sleeve extending through the bearing, means for moving the sleeve with the shaft, stop means engaged by the sleeve during a portion of the shaft oscillation, and linkage connecting the sleeve with the blade, said linkage moving with the arm when the sleeve is free while the blade is passing over the straight windshield surface portionand shifting relative to said arm when the sleeve is stopped and the blade is passing over the curved windshield surface portion and thereby maintaining the blade wiping edge parallel to straight lines on the curved surface portion.

7. A device for wiping a windshield surface having curved and nat portions in a transverse direction comprising a blade having a straight with the arm, and means holding said means stationary relative to the blade during travel of the blade over the curved portion of the windshield surface to shift the position of the blade and maintain the blade wiping edge parallel to straight lines on the curved surface.

8. A device for wiping a windshield surface having curved and flat surface portions in a transverse direction comprising a blade having a straight wiping edge contacting the surface, an actuator arm having pivoted together sections, a shaft adapted to be oscillated, one of said arm sections being pivoted to said blade and the o'ther arm section being fixed to oscillate with said shaft, a spring connecting saidL sections and urging the blade arm section toward the windshield surface; an anchored bearing through which the shaft extends having an inwardly extending stop element, a sleeve extending through the bearing around the shaft, said sleeve having a slot therein into which the stop element projects, spring means connecting the sleeve with the bearing and urging rotation of the sleeve to engage one terminal of the slot against the stop element, a driving pin fixed to said' shaft and extending into the slot in said sleeve, said pin driving said sleeve with said shaft except when traversing the slot, and link means connecting the sleeve with the wiper blade, said link meanscausing the blade to shift angularly relative to the arm while the sleeve is held stationary by the stop element.

9. A device for wiping a windshield surface having curved andlflat portions in a transverse direction comprising a blade having a straight edge wiper portion for contacting the windshield surface, an arm pivoted at one end to the blade, a shaft pivoted to the other end of the arm and adapted to oscillate the blade across the curved and flat portions of the windshield surface, a link parallel to the arm having an end pivotally connected to the blade, a sleeve concentric with the shaft to which the other end of the link is pivoted, and means coacting with said shaft and sleeve holding the arm and link in the one relation while the blade is passing over the flat portion of the windshield surface and shifting the link relative to the arm to shift the blade into parallel relation to vertical lines on the Windshield curved surface when passing thereover.

CLYDE R; PA'roN.

CERTIFICATE CE CORRECTION.

Patent No. 2,556,1I2h. August 22, 191m.

CLI-DER. PAToN.l

It is hereby certified that error -appears in the printed specification of the above numbered patent requiring Correction as follows: Page 2 first column, line LT1, claim 1, after arm strike out "pivqtecw; 11n@ 58, claim 2, after ihe word "connecting" insert --tnep arm;' and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case 1n 'the Patent office.

signed and sealed thisv mth day of November, A. D. 191m.

Leslie Frazer (Seal) Acting Commissioner of Patents. 

